SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is planning to migrate its on-premises Oracle database to Amazon RDS for Oracle using AWS DMS. The database is 5 TB in size with continuous changes. Which TWO steps should the company take to minimize downtime during the migration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up ongoing replication using change data capture (CDC) from the start.
Setting up ongoing replication using change data capture (CDC) from the start allows continuous synchronization of changes, minimizing the final cutover downtime. Option D is correct because using a large DMS replication instance improves throughput and speeds up the data transfer, reducing the overall migration time. Option B is incorrect because Multi-AZ is a high-availability feature for the target RDS instance, not a factor in migration speed or downtime reduction. Option C is incorrect because while AWS Direct Connect can provide a reliable network connection, it is not a specific step to minimize downtime during migration; the primary focus should be on replication strategy and instance size. Option E is incorrect because performing a full load first and then applying CDC after the cutover window would result in a longer downtime compared to having CDC running from the start.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Set up ongoing replication using change data capture (CDC) from the start.
Why this is correct
CDC minimizes downtime by replicating changes continuously.
- ✗
Enable Multi-AZ on the target RDS instance during migration.
Why it's wrong here
Multi-AZ doesn't speed up migration.
- ✗
Use AWS Direct Connect to establish a dedicated network connection.
Why it's wrong here
Not required; VPN is sufficient.
- ✓
Use a large DMS replication instance to improve throughput.
Why this is correct
Larger instance handles higher load.
- ✗
Perform a full load migration first, then apply CDC after the cutover window.
Why it's wrong here
CDC should run during full load to reduce downtime.
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Same concept, more angles
3 more ways this is tested on SAP-C02
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Variation 1. A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and the company has a 1 Gbps AWS Direct Connect connection. They need to minimize downtime. Which approach should the solutions architect recommend?
medium- A.Export the database using Oracle Data Pump and import into RDS
- B.Use AWS Snowball Edge to transfer the database files and then restore to RDS
- C.Use AWS Schema Conversion Tool to convert the schema and AWS DMS for data migration without CDC
- ✓ D.Use AWS DMS with full load followed by ongoing replication using change data capture (CDC)
Why D: AWS Database Migration Service (DMS) with change data capture (CDC) allows continuous replication and minimal downtime. Export/import would cause downtime. AWS Schema Conversion Tool (SCT) is for schema conversion, not data migration. Snowball is for offline data transfer and would delay the process.
Variation 2. A company is planning to migrate its on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and the company has a high-speed network connection to AWS. Which AWS service should the company use to migrate the database with minimal downtime?
easy- A.Amazon S3 Transfer Acceleration
- ✓ B.AWS Database Migration Service (DMS)
- C.AWS Snowball Edge
- D.AWS Schema Conversion Tool (SCT)
Why B: AWS DMS supports Oracle to RDS for Oracle migration with ongoing replication for minimal downtime. Option A is incorrect because S3 Transfer Acceleration is used for accelerating uploads to S3, not for database migration. Option C is incorrect because Snowball Edge is for offline data transfer and not suitable for databases with minimal downtime. Option D is incorrect because AWS Schema Conversion Tool (SCT) is used for schema conversion, not data migration.
Variation 3. A company is planning to migrate its on-premises Oracle database to Amazon RDS for Oracle. Which actions should the company take to minimize downtime during the migration? (Choose TWO.)
easy- A.Take a full backup of the on-premises database and restore it to RDS during a maintenance window.
- B.Use AWS Direct Connect to establish a dedicated network connection for faster data transfer.
- C.Increase the allocated storage on the target RDS instance to improve write performance.
- ✓ D.Use AWS Schema Conversion Tool (SCT) to convert the schema and optimize for RDS.
- ✓ E.Use AWS Database Migration Service (DMS) with ongoing replication to keep the target in sync.
Why D: Options D and E are correct. AWS Schema Conversion Tool (SCT) converts the schema to be compatible with Amazon RDS for Oracle, reducing compatibility issues. AWS Database Migration Service (DMS) with ongoing replication allows continuous sync from the source to target, minimizing downtime during migration. Option A (full backup and restore) requires downtime during the restore. Option B (Direct Connect) improves transfer speed but does not directly minimize downtime; it's a network enhancement. Option C (increased storage) improves write performance but does not minimize migration downtime.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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